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clc
clear
format long

for n=1:8;
    R=ones(5,100*n,100*n);
    R=R.*(1+i);
    t1=cputime;
    for nn=1:50 %ΪÁ˸ü׼ȷµÄµÃµ½Ê±¼ä²î£¬¶àÑ­»·¼¸´Î
        R=sin(R.*R+R);
    end
    t2=cputime;
    t(n)=t2-t1;
end

m=1:n;
x=t(n)/n^2.*m.^2;% ʹÓÃforÑ­»·ËùÓõÄʱ¼ä
plot(t./x),grid minor
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nobbs

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